Cardiogenic Shock and ICU Basics
Recognize cardiogenic shock early, understand support concepts, and escalate fast.
Learning Objectives
- 1.Recognize cardiogenic shock.
- 2.Understand the conceptual role of mechanical support.
- 3.Act on the APP priority: recognize early and escalate.
Overview
Cardiogenic shock is the heart failing to perfuse the body. It is high-mortality and time-critical — the single most important APP skill here is recognizing it early and escalating, not managing it alone.
Recognizing shock
- •Hypoperfusion: hypotension, cool/mottled extremities, altered mentation, low urine output, rising lactate.
- •A cardiac cause: large MI, acute decompensated HF, severe valve disease, arrhythmia, mechanical complication.
- •The "cold" profiles from the ADHF framework.
Escalate immediately
Cardiogenic shock is an emergency — escalate to the physician/ICU and activate the appropriate pathway (including cath lab for ACS-related shock) at recognition.
Initial approach
- •Stabilize: airway/breathing/circulation, monitor, IV access, treat the reversible cause (e.g., revascularize an MI).
- •Vasopressors/inotropes are physician/ICU-directed.
- •Identify and treat the precipitant urgently.
Mechanical support (concepts)
- •Intra-aortic balloon pump (IABP), percutaneous LVADs (e.g., Impella), and VA-ECMO provide temporary circulatory support.
- •These are specialist/ICU decisions; your role is recognition, escalation, and supportive coordination.
Scope
This is conceptual understanding for follow-up, complication recognition, and escalation. APPs do not perform these procedures, program devices beyond recognition/triage, or read raw images — those are the proceduralist’s/imager’s role.
Common beginner mistakes
- •Attributing hypotension/confusion to something benign and delaying escalation.
- •Aggressively diuresing a hypoperfused ("cold") patient.
- •Trying to manage shock without physician/ICU involvement.
Mini cases
Large anterior MI patient becomes hypotensive, cool, confused, with rising lactate and low urine output.
Action?
Show answer
Cardiogenic shock complicating MI — emergency. Escalate immediately, activate the cath-lab/ICU pathway (revascularization is key), and support per physician direction. This is recognize-and-escalate, fast.
A "cold and wet" HF patient is getting aggressive diuresis and worsening.
What’s the risk?
Show answer
Aggressive diuresis in hypoperfusion can worsen perfusion. This patient needs escalation and possibly inotropic/mechanical support — recognize the cold profile and get help.